Related Experiment Video
Updated: Feb 14, 2026

Robotic Ablation of Atrial Fibrillation
Published on: May 29, 2015
Predictive risk factors for recurrent atrial fibrillation after modified endoscopic ablation: A 2-year follow-up
Kang An1, Jiaquan Zhu1, Nan Ma1
1Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China.
Background:
Our previous study reported a modified endoscopic procedure for nonvalvular atrial fibrillation (AF) that requires only 3 ports in the left chest wall.
Hypothesis:
Certain preoperative variables might be predictive risk factors for AF recurrence among patients who underwent this procedure.
Methods:
From October 2010 to April 2014, 114 patients with either paroxysmal AF (PAF) or nonparoxysmal AF (non-PAF) underwent the procedure and completed postoperative cardiac-rhythm measurement via electrocardiography and Holter monitoring. Univariate and multivariate analyses of the possible AF-related risk factors were conducted.
Results:
During 2-year follow-up, 99 of 114 patients (86.8%) were free from atrial tachyarrhythmia. Results from univariate analyses showed that AF duration, left atrial diameter (LAD), left atrial minimum volume, left atrial empty fraction, left atrial expansion index, and left atrial active empty fraction (LAAEF) were significantly associated with postoperative AF recurrence. Results from multivariate analyses showed that AF duration (odds ratio [OR]: 1.194, 95% CI: 1.063-1.340, P = 0.003), LAD (OR: 1.101, 95% CI: 1.005-1.205, P = 0.039), and LAAEF (OR: 0.490, 95% CI: 0.277-0.865, P = 0.014) were independent risk factors. There was no difference in AF recurrence between patients with PAF and non-PAF (P = 0.250).
Conclusions:
Our 2-year follow-up study suggested that low LAAEF, long AF duration, and large LAD might be potential predictive risk factors for AF recurrence. Patients with PAF and non-PAF had a similar AF recurrence rate after modified endoscopic ablation.
More Related Videos
Related Concept Videos
Factors Affecting the Risk of Infection
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid Fibrils
Drug Toxicity: Risk factors
Predicting Products: SN1 vs. SN2
With increased substitution on the alkyl halide,...
Modified-Release Drug Delivery Systems: Influencing Factors

